topic Re: Unsupported major.minor version 51.0 in Alfresco Archive

Unsupported major.minor version 51.0

p_wilson — Wed, 27 Nov 2013 16:13:11 GMT

Good evening all, this is my first post but I have been in and out of these forums for weeks. It's been very helpful and now I have a little problem that I can't seem to find the answer to.Yesterday I had a fully running activiti setup, running both rest and explorer instances. Unfortunately, I had

Re: Unsupported major.minor version 51.0

martin_grofcik — Thu, 28 Nov 2013 08:51:53 GMT

It is not an activiti error. Which version of JRE are you using?
(class is compiled with java 7)

Re: Unsupported major.minor version 51.0

p_wilson — Thu, 28 Nov 2013 10:10:46 GMT

Oh, I am using Oracle java 7.
Now that I know it is a java issue I will give it a tinker today and see what I can see.

Re: Unsupported major.minor version 51.0

p_wilson — Thu, 28 Nov 2013 12:45:58 GMT

This issue is now solved.

The problem was an improper java installation on the debian server.

To solve an error such as this it was necessary to remove all and any previous versions of java that may exist (for me this was openjdk which was installed automatically by my 'kind' VPS providers when they did a clean rebuild of the operating system). It is then a simple matter of re-installing oracle java 7 and ensuring the paths are correctly set.

Activiti 5.14 is now up and active.

I hope that this will be helpful to someone.

Regards
Phil